ssl_sess.c revision 306195
1/* ssl/ssl_sess.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2005 Nokia. All rights reserved. 113 * 114 * The portions of the attached software ("Contribution") is developed by 115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 116 * license. 117 * 118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 120 * support (see RFC 4279) to OpenSSL. 121 * 122 * No patent licenses or other rights except those expressly stated in 123 * the OpenSSL open source license shall be deemed granted or received 124 * expressly, by implication, estoppel, or otherwise. 125 * 126 * No assurances are provided by Nokia that the Contribution does not 127 * infringe the patent or other intellectual property rights of any third 128 * party or that the license provides you with all the necessary rights 129 * to make use of the Contribution. 130 * 131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 135 * OTHERWISE. 136 */ 137 138#include <stdio.h> 139#include <openssl/lhash.h> 140#include <openssl/rand.h> 141#ifndef OPENSSL_NO_ENGINE 142# include <openssl/engine.h> 143#endif 144#include "ssl_locl.h" 145 146static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 147static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 148static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); 149 150SSL_SESSION *SSL_get_session(const SSL *ssl) 151/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 152{ 153 return (ssl->session); 154} 155 156SSL_SESSION *SSL_get1_session(SSL *ssl) 157/* variant of SSL_get_session: caller really gets something */ 158{ 159 SSL_SESSION *sess; 160 /* 161 * Need to lock this all up rather than just use CRYPTO_add so that 162 * somebody doesn't free ssl->session between when we check it's non-null 163 * and when we up the reference count. 164 */ 165 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); 166 sess = ssl->session; 167 if (sess) 168 sess->references++; 169 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); 170 return (sess); 171} 172 173int SSL_SESSION_get_ex_new_index(long argl, void *argp, 174 CRYPTO_EX_new *new_func, 175 CRYPTO_EX_dup *dup_func, 176 CRYPTO_EX_free *free_func) 177{ 178 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, 179 new_func, dup_func, free_func); 180} 181 182int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 183{ 184 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 185} 186 187void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 188{ 189 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 190} 191 192SSL_SESSION *SSL_SESSION_new(void) 193{ 194 SSL_SESSION *ss; 195 196 ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); 197 if (ss == NULL) { 198 SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); 199 return (0); 200 } 201 memset(ss, 0, sizeof(SSL_SESSION)); 202 203 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 204 ss->references = 1; 205 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ 206 ss->time = (unsigned long)time(NULL); 207 ss->prev = NULL; 208 ss->next = NULL; 209 ss->compress_meth = 0; 210#ifndef OPENSSL_NO_TLSEXT 211 ss->tlsext_hostname = NULL; 212# ifndef OPENSSL_NO_EC 213 ss->tlsext_ecpointformatlist_length = 0; 214 ss->tlsext_ecpointformatlist = NULL; 215 ss->tlsext_ellipticcurvelist_length = 0; 216 ss->tlsext_ellipticcurvelist = NULL; 217# endif 218#endif 219 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 220#ifndef OPENSSL_NO_PSK 221 ss->psk_identity_hint = NULL; 222 ss->psk_identity = NULL; 223#endif 224#ifndef OPENSSL_NO_SRP 225 ss->srp_username = NULL; 226#endif 227 return (ss); 228} 229 230/* 231 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If 232 * ticket == 0 then no ticket information is duplicated, otherwise it is. 233 */ 234SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) 235{ 236 SSL_SESSION *dest; 237 238 dest = OPENSSL_malloc(sizeof(*src)); 239 if (dest == NULL) { 240 goto err; 241 } 242 memcpy(dest, src, sizeof(*dest)); 243 244 /* 245 * Set the various pointers to NULL so that we can call SSL_SESSION_free in 246 * the case of an error whilst halfway through constructing dest 247 */ 248#ifndef OPENSSL_NO_PSK 249 dest->psk_identity_hint = NULL; 250 dest->psk_identity = NULL; 251#endif 252 dest->ciphers = NULL; 253#ifndef OPENSSL_NO_TLSEXT 254 dest->tlsext_hostname = NULL; 255# ifndef OPENSSL_NO_EC 256 dest->tlsext_ecpointformatlist = NULL; 257 dest->tlsext_ellipticcurvelist = NULL; 258# endif 259 dest->tlsext_tick = NULL; 260#endif 261#ifndef OPENSSL_NO_SRP 262 dest->srp_username = NULL; 263#endif 264 memset(&dest->ex_data, 0, sizeof(dest->ex_data)); 265 266 /* We deliberately don't copy the prev and next pointers */ 267 dest->prev = NULL; 268 dest->next = NULL; 269 270 dest->references = 1; 271 272 if (src->sess_cert != NULL) 273 CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT); 274 275 if (src->peer != NULL) 276 CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509); 277 278#ifndef OPENSSL_NO_PSK 279 if (src->psk_identity_hint) { 280 dest->psk_identity_hint = BUF_strdup(src->psk_identity_hint); 281 if (dest->psk_identity_hint == NULL) { 282 goto err; 283 } 284 } 285 if (src->psk_identity) { 286 dest->psk_identity = BUF_strdup(src->psk_identity); 287 if (dest->psk_identity == NULL) { 288 goto err; 289 } 290 } 291#endif 292 293 if(src->ciphers != NULL) { 294 dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); 295 if (dest->ciphers == NULL) 296 goto err; 297 } 298 299 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, 300 &dest->ex_data, &src->ex_data)) { 301 goto err; 302 } 303 304#ifndef OPENSSL_NO_TLSEXT 305 if (src->tlsext_hostname) { 306 dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname); 307 if (dest->tlsext_hostname == NULL) { 308 goto err; 309 } 310 } 311# ifndef OPENSSL_NO_EC 312 if (src->tlsext_ecpointformatlist) { 313 dest->tlsext_ecpointformatlist = 314 BUF_memdup(src->tlsext_ecpointformatlist, 315 src->tlsext_ecpointformatlist_length); 316 if (dest->tlsext_ecpointformatlist == NULL) 317 goto err; 318 } 319 if (src->tlsext_ellipticcurvelist) { 320 dest->tlsext_ellipticcurvelist = 321 BUF_memdup(src->tlsext_ellipticcurvelist, 322 src->tlsext_ellipticcurvelist_length); 323 if (dest->tlsext_ellipticcurvelist == NULL) 324 goto err; 325 } 326# endif 327 328 if (ticket != 0) { 329 dest->tlsext_tick = BUF_memdup(src->tlsext_tick, src->tlsext_ticklen); 330 if(dest->tlsext_tick == NULL) 331 goto err; 332 } else { 333 dest->tlsext_tick_lifetime_hint = 0; 334 dest->tlsext_ticklen = 0; 335 } 336#endif 337 338#ifndef OPENSSL_NO_SRP 339 if (src->srp_username) { 340 dest->srp_username = BUF_strdup(src->srp_username); 341 if (dest->srp_username == NULL) { 342 goto err; 343 } 344 } 345#endif 346 347 return dest; 348err: 349 SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); 350 SSL_SESSION_free(dest); 351 return NULL; 352} 353 354const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, 355 unsigned int *len) 356{ 357 if (len) 358 *len = s->session_id_length; 359 return s->session_id; 360} 361 362unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) 363{ 364 return s->compress_meth; 365} 366 367/* 368 * Even with SSLv2, we have 16 bytes (128 bits) of session ID space. 369 * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random 370 * gunk repeatedly until we have no conflict is going to complete in one 371 * iteration pretty much "most" of the time (btw: understatement). So, if it 372 * takes us 10 iterations and we still can't avoid a conflict - well that's a 373 * reasonable point to call it quits. Either the RAND code is broken or 374 * someone is trying to open roughly very close to 2^128 (or 2^256) SSL 375 * sessions to our server. How you might store that many sessions is perhaps 376 * a more interesting question ... 377 */ 378 379#define MAX_SESS_ID_ATTEMPTS 10 380static int def_generate_session_id(const SSL *ssl, unsigned char *id, 381 unsigned int *id_len) 382{ 383 unsigned int retry = 0; 384 do 385 if (RAND_bytes(id, *id_len) <= 0) 386 return 0; 387 while (SSL_has_matching_session_id(ssl, id, *id_len) && 388 (++retry < MAX_SESS_ID_ATTEMPTS)) ; 389 if (retry < MAX_SESS_ID_ATTEMPTS) 390 return 1; 391 /* else - woops a session_id match */ 392 /* 393 * XXX We should also check the external cache -- but the probability of 394 * a collision is negligible, and we could not prevent the concurrent 395 * creation of sessions with identical IDs since we currently don't have 396 * means to atomically check whether a session ID already exists and make 397 * a reservation for it if it does not (this problem applies to the 398 * internal cache as well). 399 */ 400 return 0; 401} 402 403int ssl_get_new_session(SSL *s, int session) 404{ 405 /* This gets used by clients and servers. */ 406 407 unsigned int tmp; 408 SSL_SESSION *ss = NULL; 409 GEN_SESSION_CB cb = def_generate_session_id; 410 411 if ((ss = SSL_SESSION_new()) == NULL) 412 return (0); 413 414 /* If the context has a default timeout, use it */ 415 if (s->session_ctx->session_timeout == 0) 416 ss->timeout = SSL_get_default_timeout(s); 417 else 418 ss->timeout = s->session_ctx->session_timeout; 419 420 if (s->session != NULL) { 421 SSL_SESSION_free(s->session); 422 s->session = NULL; 423 } 424 425 if (session) { 426 if (s->version == SSL2_VERSION) { 427 ss->ssl_version = SSL2_VERSION; 428 ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH; 429 } else if (s->version == SSL3_VERSION) { 430 ss->ssl_version = SSL3_VERSION; 431 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 432 } else if (s->version == TLS1_VERSION) { 433 ss->ssl_version = TLS1_VERSION; 434 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 435 } else if (s->version == TLS1_1_VERSION) { 436 ss->ssl_version = TLS1_1_VERSION; 437 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 438 } else if (s->version == TLS1_2_VERSION) { 439 ss->ssl_version = TLS1_2_VERSION; 440 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 441 } else if (s->version == DTLS1_BAD_VER) { 442 ss->ssl_version = DTLS1_BAD_VER; 443 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 444 } else if (s->version == DTLS1_VERSION) { 445 ss->ssl_version = DTLS1_VERSION; 446 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 447 } else if (s->version == DTLS1_2_VERSION) { 448 ss->ssl_version = DTLS1_2_VERSION; 449 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 450 } else { 451 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); 452 SSL_SESSION_free(ss); 453 return (0); 454 } 455#ifndef OPENSSL_NO_TLSEXT 456 /*- 457 * If RFC5077 ticket, use empty session ID (as server). 458 * Note that: 459 * (a) ssl_get_prev_session() does lookahead into the 460 * ClientHello extensions to find the session ticket. 461 * When ssl_get_prev_session() fails, s3_srvr.c calls 462 * ssl_get_new_session() in ssl3_get_client_hello(). 463 * At that point, it has not yet parsed the extensions, 464 * however, because of the lookahead, it already knows 465 * whether a ticket is expected or not. 466 * 467 * (b) s3_clnt.c calls ssl_get_new_session() before parsing 468 * ServerHello extensions, and before recording the session 469 * ID received from the server, so this block is a noop. 470 */ 471 if (s->tlsext_ticket_expected) { 472 ss->session_id_length = 0; 473 goto sess_id_done; 474 } 475#endif 476 /* Choose which callback will set the session ID */ 477 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 478 if (s->generate_session_id) 479 cb = s->generate_session_id; 480 else if (s->session_ctx->generate_session_id) 481 cb = s->session_ctx->generate_session_id; 482 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 483 /* Choose a session ID */ 484 tmp = ss->session_id_length; 485 if (!cb(s, ss->session_id, &tmp)) { 486 /* The callback failed */ 487 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 488 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 489 SSL_SESSION_free(ss); 490 return (0); 491 } 492 /* 493 * Don't allow the callback to set the session length to zero. nor 494 * set it higher than it was. 495 */ 496 if (!tmp || (tmp > ss->session_id_length)) { 497 /* The callback set an illegal length */ 498 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 499 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 500 SSL_SESSION_free(ss); 501 return (0); 502 } 503 /* If the session length was shrunk and we're SSLv2, pad it */ 504 if ((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) 505 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); 506 else 507 ss->session_id_length = tmp; 508 /* Finally, check for a conflict */ 509 if (SSL_has_matching_session_id(s, ss->session_id, 510 ss->session_id_length)) { 511 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); 512 SSL_SESSION_free(ss); 513 return (0); 514 } 515#ifndef OPENSSL_NO_TLSEXT 516 sess_id_done: 517 if (s->tlsext_hostname) { 518 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); 519 if (ss->tlsext_hostname == NULL) { 520 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 521 SSL_SESSION_free(ss); 522 return 0; 523 } 524 } 525#endif 526 } else { 527 ss->session_id_length = 0; 528 } 529 530 if (s->sid_ctx_length > sizeof ss->sid_ctx) { 531 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 532 SSL_SESSION_free(ss); 533 return 0; 534 } 535 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 536 ss->sid_ctx_length = s->sid_ctx_length; 537 s->session = ss; 538 ss->ssl_version = s->version; 539 ss->verify_result = X509_V_OK; 540 541 return (1); 542} 543 544/*- 545 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this 546 * connection. It is only called by servers. 547 * 548 * session_id: points at the session ID in the ClientHello. This code will 549 * read past the end of this in order to parse out the session ticket 550 * extension, if any. 551 * len: the length of the session ID. 552 * limit: a pointer to the first byte after the ClientHello. 553 * 554 * Returns: 555 * -1: error 556 * 0: a session may have been found. 557 * 558 * Side effects: 559 * - If a session is found then s->session is pointed at it (after freeing an 560 * existing session if need be) and s->verify_result is set from the session. 561 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1 562 * if the server should issue a new session ticket (to 0 otherwise). 563 */ 564int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, 565 const unsigned char *limit) 566{ 567 /* This is used only by servers. */ 568 569 SSL_SESSION *ret = NULL; 570 int fatal = 0; 571 int try_session_cache = 1; 572#ifndef OPENSSL_NO_TLSEXT 573 int r; 574#endif 575 576 if (limit - session_id < len) { 577 fatal = 1; 578 goto err; 579 } 580 581 if (len == 0) 582 try_session_cache = 0; 583 584#ifndef OPENSSL_NO_TLSEXT 585 /* sets s->tlsext_ticket_expected */ 586 r = tls1_process_ticket(s, session_id, len, limit, &ret); 587 switch (r) { 588 case -1: /* Error during processing */ 589 fatal = 1; 590 goto err; 591 case 0: /* No ticket found */ 592 case 1: /* Zero length ticket found */ 593 break; /* Ok to carry on processing session id. */ 594 case 2: /* Ticket found but not decrypted. */ 595 case 3: /* Ticket decrypted, *ret has been set. */ 596 try_session_cache = 0; 597 break; 598 default: 599 abort(); 600 } 601#endif 602 603 if (try_session_cache && 604 ret == NULL && 605 !(s->session_ctx->session_cache_mode & 606 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { 607 SSL_SESSION data; 608 data.ssl_version = s->version; 609 data.session_id_length = len; 610 if (len == 0) 611 return 0; 612 memcpy(data.session_id, session_id, len); 613 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 614 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 615 if (ret != NULL) { 616 /* don't allow other threads to steal it: */ 617 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 618 } 619 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 620 if (ret == NULL) 621 s->session_ctx->stats.sess_miss++; 622 } 623 624 if (try_session_cache && 625 ret == NULL && s->session_ctx->get_session_cb != NULL) { 626 int copy = 1; 627 628 if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { 629 s->session_ctx->stats.sess_cb_hit++; 630 631 /* 632 * Increment reference count now if the session callback asks us 633 * to do so (note that if the session structures returned by the 634 * callback are shared between threads, it must handle the 635 * reference count itself [i.e. copy == 0], or things won't be 636 * thread-safe). 637 */ 638 if (copy) 639 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 640 641 /* 642 * Add the externally cached session to the internal cache as 643 * well if and only if we are supposed to. 644 */ 645 if (! 646 (s->session_ctx->session_cache_mode & 647 SSL_SESS_CACHE_NO_INTERNAL_STORE)) 648 /* 649 * The following should not return 1, otherwise, things are 650 * very strange 651 */ 652 SSL_CTX_add_session(s->session_ctx, ret); 653 } 654 } 655 656 if (ret == NULL) 657 goto err; 658 659 /* Now ret is non-NULL and we own one of its reference counts. */ 660 661 if (ret->sid_ctx_length != s->sid_ctx_length 662 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { 663 /* 664 * We have the session requested by the client, but we don't want to 665 * use it in this context. 666 */ 667 goto err; /* treat like cache miss */ 668 } 669 670 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 671 /* 672 * We can't be sure if this session is being used out of context, 673 * which is especially important for SSL_VERIFY_PEER. The application 674 * should have used SSL[_CTX]_set_session_id_context. For this error 675 * case, we generate an error instead of treating the event like a 676 * cache miss (otherwise it would be easy for applications to 677 * effectively disable the session cache by accident without anyone 678 * noticing). 679 */ 680 681 SSLerr(SSL_F_SSL_GET_PREV_SESSION, 682 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 683 fatal = 1; 684 goto err; 685 } 686 687 if (ret->cipher == NULL) { 688 unsigned char buf[5], *p; 689 unsigned long l; 690 691 p = buf; 692 l = ret->cipher_id; 693 l2n(l, p); 694 if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) 695 ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); 696 else 697 ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); 698 if (ret->cipher == NULL) 699 goto err; 700 } 701 702 if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ 703 s->session_ctx->stats.sess_timeout++; 704 if (try_session_cache) { 705 /* session was from the cache, so remove it */ 706 SSL_CTX_remove_session(s->session_ctx, ret); 707 } 708 goto err; 709 } 710 711 s->session_ctx->stats.sess_hit++; 712 713 if (s->session != NULL) 714 SSL_SESSION_free(s->session); 715 s->session = ret; 716 s->verify_result = s->session->verify_result; 717 return 1; 718 719 err: 720 if (ret != NULL) { 721 SSL_SESSION_free(ret); 722#ifndef OPENSSL_NO_TLSEXT 723 if (!try_session_cache) { 724 /* 725 * The session was from a ticket, so we should issue a ticket for 726 * the new session 727 */ 728 s->tlsext_ticket_expected = 1; 729 } 730#endif 731 } 732 if (fatal) 733 return -1; 734 else 735 return 0; 736} 737 738int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 739{ 740 int ret = 0; 741 SSL_SESSION *s; 742 743 /* 744 * add just 1 reference count for the SSL_CTX's session cache even though 745 * it has two ways of access: each session is in a doubly linked list and 746 * an lhash 747 */ 748 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); 749 /* 750 * if session c is in already in cache, we take back the increment later 751 */ 752 753 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 754 s = lh_SSL_SESSION_insert(ctx->sessions, c); 755 756 /* 757 * s != NULL iff we already had a session with the given PID. In this 758 * case, s == c should hold (then we did not really modify 759 * ctx->sessions), or we're in trouble. 760 */ 761 if (s != NULL && s != c) { 762 /* We *are* in trouble ... */ 763 SSL_SESSION_list_remove(ctx, s); 764 SSL_SESSION_free(s); 765 /* 766 * ... so pretend the other session did not exist in cache (we cannot 767 * handle two SSL_SESSION structures with identical session ID in the 768 * same cache, which could happen e.g. when two threads concurrently 769 * obtain the same session from an external cache) 770 */ 771 s = NULL; 772 } 773 774 /* Put at the head of the queue unless it is already in the cache */ 775 if (s == NULL) 776 SSL_SESSION_list_add(ctx, c); 777 778 if (s != NULL) { 779 /* 780 * existing cache entry -- decrement previously incremented reference 781 * count because it already takes into account the cache 782 */ 783 784 SSL_SESSION_free(s); /* s == c */ 785 ret = 0; 786 } else { 787 /* 788 * new cache entry -- remove old ones if cache has become too large 789 */ 790 791 ret = 1; 792 793 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 794 while (SSL_CTX_sess_number(ctx) > 795 SSL_CTX_sess_get_cache_size(ctx)) { 796 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) 797 break; 798 else 799 ctx->stats.sess_cache_full++; 800 } 801 } 802 } 803 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 804 return (ret); 805} 806 807int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 808{ 809 return remove_session_lock(ctx, c, 1); 810} 811 812static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 813{ 814 SSL_SESSION *r; 815 int ret = 0; 816 817 if ((c != NULL) && (c->session_id_length != 0)) { 818 if (lck) 819 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 820 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { 821 ret = 1; 822 r = lh_SSL_SESSION_delete(ctx->sessions, c); 823 SSL_SESSION_list_remove(ctx, c); 824 } 825 826 if (lck) 827 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 828 829 if (ret) { 830 r->not_resumable = 1; 831 if (ctx->remove_session_cb != NULL) 832 ctx->remove_session_cb(ctx, r); 833 SSL_SESSION_free(r); 834 } 835 } else 836 ret = 0; 837 return (ret); 838} 839 840void SSL_SESSION_free(SSL_SESSION *ss) 841{ 842 int i; 843 844 if (ss == NULL) 845 return; 846 847 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); 848#ifdef REF_PRINT 849 REF_PRINT("SSL_SESSION", ss); 850#endif 851 if (i > 0) 852 return; 853#ifdef REF_CHECK 854 if (i < 0) { 855 fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); 856 abort(); /* ok */ 857 } 858#endif 859 860 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 861 862 OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg); 863 OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); 864 OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); 865 if (ss->sess_cert != NULL) 866 ssl_sess_cert_free(ss->sess_cert); 867 if (ss->peer != NULL) 868 X509_free(ss->peer); 869 if (ss->ciphers != NULL) 870 sk_SSL_CIPHER_free(ss->ciphers); 871#ifndef OPENSSL_NO_TLSEXT 872 if (ss->tlsext_hostname != NULL) 873 OPENSSL_free(ss->tlsext_hostname); 874 if (ss->tlsext_tick != NULL) 875 OPENSSL_free(ss->tlsext_tick); 876# ifndef OPENSSL_NO_EC 877 ss->tlsext_ecpointformatlist_length = 0; 878 if (ss->tlsext_ecpointformatlist != NULL) 879 OPENSSL_free(ss->tlsext_ecpointformatlist); 880 ss->tlsext_ellipticcurvelist_length = 0; 881 if (ss->tlsext_ellipticcurvelist != NULL) 882 OPENSSL_free(ss->tlsext_ellipticcurvelist); 883# endif /* OPENSSL_NO_EC */ 884#endif 885#ifndef OPENSSL_NO_PSK 886 if (ss->psk_identity_hint != NULL) 887 OPENSSL_free(ss->psk_identity_hint); 888 if (ss->psk_identity != NULL) 889 OPENSSL_free(ss->psk_identity); 890#endif 891#ifndef OPENSSL_NO_SRP 892 if (ss->srp_username != NULL) 893 OPENSSL_free(ss->srp_username); 894#endif 895 OPENSSL_cleanse(ss, sizeof(*ss)); 896 OPENSSL_free(ss); 897} 898 899int SSL_set_session(SSL *s, SSL_SESSION *session) 900{ 901 int ret = 0; 902 const SSL_METHOD *meth; 903 904 if (session != NULL) { 905 meth = s->ctx->method->get_ssl_method(session->ssl_version); 906 if (meth == NULL) 907 meth = s->method->get_ssl_method(session->ssl_version); 908 if (meth == NULL) { 909 SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); 910 return (0); 911 } 912 913 if (meth != s->method) { 914 if (!SSL_set_ssl_method(s, meth)) 915 return (0); 916 } 917#ifndef OPENSSL_NO_KRB5 918 if (s->kssl_ctx && !s->kssl_ctx->client_princ && 919 session->krb5_client_princ_len > 0) { 920 s->kssl_ctx->client_princ = 921 (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); 922 if (s->kssl_ctx->client_princ == NULL) { 923 SSLerr(SSL_F_SSL_SET_SESSION, ERR_R_MALLOC_FAILURE); 924 return 0; 925 } 926 memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, 927 session->krb5_client_princ_len); 928 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; 929 } 930#endif /* OPENSSL_NO_KRB5 */ 931 932 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ 933 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); 934 if (s->session != NULL) 935 SSL_SESSION_free(s->session); 936 s->session = session; 937 s->verify_result = s->session->verify_result; 938 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ 939 ret = 1; 940 } else { 941 if (s->session != NULL) { 942 SSL_SESSION_free(s->session); 943 s->session = NULL; 944 } 945 946 meth = s->ctx->method; 947 if (meth != s->method) { 948 if (!SSL_set_ssl_method(s, meth)) 949 return (0); 950 } 951 ret = 1; 952 } 953 return (ret); 954} 955 956long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 957{ 958 if (s == NULL) 959 return (0); 960 s->timeout = t; 961 return (1); 962} 963 964long SSL_SESSION_get_timeout(const SSL_SESSION *s) 965{ 966 if (s == NULL) 967 return (0); 968 return (s->timeout); 969} 970 971long SSL_SESSION_get_time(const SSL_SESSION *s) 972{ 973 if (s == NULL) 974 return (0); 975 return (s->time); 976} 977 978long SSL_SESSION_set_time(SSL_SESSION *s, long t) 979{ 980 if (s == NULL) 981 return (0); 982 s->time = t; 983 return (t); 984} 985 986X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) 987{ 988 return s->peer; 989} 990 991int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 992 unsigned int sid_ctx_len) 993{ 994 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 995 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, 996 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 997 return 0; 998 } 999 s->sid_ctx_length = sid_ctx_len; 1000 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1001 1002 return 1; 1003} 1004 1005long SSL_CTX_set_timeout(SSL_CTX *s, long t) 1006{ 1007 long l; 1008 if (s == NULL) 1009 return (0); 1010 l = s->session_timeout; 1011 s->session_timeout = t; 1012 return (l); 1013} 1014 1015long SSL_CTX_get_timeout(const SSL_CTX *s) 1016{ 1017 if (s == NULL) 1018 return (0); 1019 return (s->session_timeout); 1020} 1021 1022#ifndef OPENSSL_NO_TLSEXT 1023int SSL_set_session_secret_cb(SSL *s, 1024 int (*tls_session_secret_cb) (SSL *s, 1025 void *secret, 1026 int *secret_len, 1027 STACK_OF(SSL_CIPHER) 1028 *peer_ciphers, 1029 SSL_CIPHER 1030 **cipher, 1031 void *arg), 1032 void *arg) 1033{ 1034 if (s == NULL) 1035 return (0); 1036 s->tls_session_secret_cb = tls_session_secret_cb; 1037 s->tls_session_secret_cb_arg = arg; 1038 return (1); 1039} 1040 1041int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1042 void *arg) 1043{ 1044 if (s == NULL) 1045 return (0); 1046 s->tls_session_ticket_ext_cb = cb; 1047 s->tls_session_ticket_ext_cb_arg = arg; 1048 return (1); 1049} 1050 1051int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1052{ 1053 if (s->version >= TLS1_VERSION) { 1054 if (s->tlsext_session_ticket) { 1055 OPENSSL_free(s->tlsext_session_ticket); 1056 s->tlsext_session_ticket = NULL; 1057 } 1058 1059 s->tlsext_session_ticket = 1060 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1061 if (!s->tlsext_session_ticket) { 1062 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); 1063 return 0; 1064 } 1065 1066 if (ext_data) { 1067 s->tlsext_session_ticket->length = ext_len; 1068 s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; 1069 memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); 1070 } else { 1071 s->tlsext_session_ticket->length = 0; 1072 s->tlsext_session_ticket->data = NULL; 1073 } 1074 1075 return 1; 1076 } 1077 1078 return 0; 1079} 1080#endif /* OPENSSL_NO_TLSEXT */ 1081 1082typedef struct timeout_param_st { 1083 SSL_CTX *ctx; 1084 long time; 1085 LHASH_OF(SSL_SESSION) *cache; 1086} TIMEOUT_PARAM; 1087 1088static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) 1089{ 1090 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ 1091 /* 1092 * The reason we don't call SSL_CTX_remove_session() is to save on 1093 * locking overhead 1094 */ 1095 (void)lh_SSL_SESSION_delete(p->cache, s); 1096 SSL_SESSION_list_remove(p->ctx, s); 1097 s->not_resumable = 1; 1098 if (p->ctx->remove_session_cb != NULL) 1099 p->ctx->remove_session_cb(p->ctx, s); 1100 SSL_SESSION_free(s); 1101 } 1102} 1103 1104static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) 1105 1106void SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1107{ 1108 unsigned long i; 1109 TIMEOUT_PARAM tp; 1110 1111 tp.ctx = s; 1112 tp.cache = s->sessions; 1113 if (tp.cache == NULL) 1114 return; 1115 tp.time = t; 1116 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 1117 i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; 1118 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; 1119 lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), 1120 TIMEOUT_PARAM, &tp); 1121 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; 1122 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 1123} 1124 1125int ssl_clear_bad_session(SSL *s) 1126{ 1127 if ((s->session != NULL) && 1128 !(s->shutdown & SSL_SENT_SHUTDOWN) && 1129 !(SSL_in_init(s) || SSL_in_before(s))) { 1130 SSL_CTX_remove_session(s->session_ctx, s->session); 1131 return (1); 1132 } else 1133 return (0); 1134} 1135 1136/* locked by SSL_CTX in the calling function */ 1137static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1138{ 1139 if ((s->next == NULL) || (s->prev == NULL)) 1140 return; 1141 1142 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1143 /* last element in list */ 1144 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1145 /* only one element in list */ 1146 ctx->session_cache_head = NULL; 1147 ctx->session_cache_tail = NULL; 1148 } else { 1149 ctx->session_cache_tail = s->prev; 1150 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1151 } 1152 } else { 1153 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1154 /* first element in list */ 1155 ctx->session_cache_head = s->next; 1156 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1157 } else { 1158 /* middle of list */ 1159 s->next->prev = s->prev; 1160 s->prev->next = s->next; 1161 } 1162 } 1163 s->prev = s->next = NULL; 1164} 1165 1166static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1167{ 1168 if ((s->next != NULL) && (s->prev != NULL)) 1169 SSL_SESSION_list_remove(ctx, s); 1170 1171 if (ctx->session_cache_head == NULL) { 1172 ctx->session_cache_head = s; 1173 ctx->session_cache_tail = s; 1174 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1175 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1176 } else { 1177 s->next = ctx->session_cache_head; 1178 s->next->prev = s; 1179 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1180 ctx->session_cache_head = s; 1181 } 1182} 1183 1184void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1185 int (*cb) (struct ssl_st *ssl, 1186 SSL_SESSION *sess)) 1187{ 1188 ctx->new_session_cb = cb; 1189} 1190 1191int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { 1192 return ctx->new_session_cb; 1193} 1194 1195void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1196 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) 1197{ 1198 ctx->remove_session_cb = cb; 1199} 1200 1201void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, 1202 SSL_SESSION *sess) { 1203 return ctx->remove_session_cb; 1204} 1205 1206void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1207 SSL_SESSION *(*cb) (struct ssl_st *ssl, 1208 unsigned char *data, int len, 1209 int *copy)) 1210{ 1211 ctx->get_session_cb = cb; 1212} 1213 1214SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, 1215 unsigned char *data, 1216 int len, int *copy) { 1217 return ctx->get_session_cb; 1218} 1219 1220void SSL_CTX_set_info_callback(SSL_CTX *ctx, 1221 void (*cb) (const SSL *ssl, int type, int val)) 1222{ 1223 ctx->info_callback = cb; 1224} 1225 1226void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, 1227 int val) { 1228 return ctx->info_callback; 1229} 1230 1231void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1232 int (*cb) (SSL *ssl, X509 **x509, 1233 EVP_PKEY **pkey)) 1234{ 1235 ctx->client_cert_cb = cb; 1236} 1237 1238int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, 1239 EVP_PKEY **pkey) { 1240 return ctx->client_cert_cb; 1241} 1242 1243#ifndef OPENSSL_NO_ENGINE 1244int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) 1245{ 1246 if (!ENGINE_init(e)) { 1247 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); 1248 return 0; 1249 } 1250 if (!ENGINE_get_ssl_client_cert_function(e)) { 1251 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, 1252 SSL_R_NO_CLIENT_CERT_METHOD); 1253 ENGINE_finish(e); 1254 return 0; 1255 } 1256 ctx->client_cert_engine = e; 1257 return 1; 1258} 1259#endif 1260 1261void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1262 int (*cb) (SSL *ssl, 1263 unsigned char *cookie, 1264 unsigned int *cookie_len)) 1265{ 1266 ctx->app_gen_cookie_cb = cb; 1267} 1268 1269void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1270 int (*cb) (SSL *ssl, unsigned char *cookie, 1271 unsigned int cookie_len)) 1272{ 1273 ctx->app_verify_cookie_cb = cb; 1274} 1275 1276IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, 1277 SSL_SESSION) 1278